Jean theodore van gestel



UNITED STATES i V PATENT EEICE.

JEAN THECDCRE vAN eEsTEL, oE NEw YoRK, N. Y., AssieNoR To THE vAN G EsTEL ELECTRIC STREET 4CAR COMPANY, YCE sAME PLACE.

ELECTRIC LAM P.

SPECIFICATION forming part of Letters :Patent No. 413,636, dated October 22, 1889.

` Application tied August 17,1838'. seria No. 283,002. (No nieder) To all whom it may concern:

Be it known that I, JEAN THEoDoRE VAN GESTEL, a subject of theKing of The Netherlands, and a resident of New York, county of New York, and State of New York, have made4 use of existing forms of electric lamps, as I will explain later on second, to so devise simple, cheap, and effective connections for the lamp which shall permit of its insertion and Withdrawal with a minimum amount Vof trouble, and be at the-same timesecure and sure of action; third, to so dispose or arrange the lamp as to give a maximum amount of light and radiate the same in planes parallel with the sides of the apartment it is desired to illuminate. To accomplish these objects I have devised the lamp and connections hereinafter "described, and particularly pointed out in the claims which follow this specification.

I have discovered that with existing types of incandescent lamps hung from the ceiling of a railway-coach or from beneath the 'deck of a steamer or pendent chandeliers and in other well-known ways there results a large percentage of breakage, due to drafts upon the unequally-heated portions of the lampglobes and their glass neck-supports. This objectionable` feature is in no sense an inherent fault of existing forms of lamp,but due rather to their exposed location and to the fact that the exposed portions are unequally heated. It is also a noticeable fact that with lamps so hung much of the light is radiated into the upper portion of the room or space to be illuminated, and therefore to all intentional purposeswasted or lost.

My novel lamp and vits connections are of such construction and are so arranged as to overcome in a very large measure all of these A obj ections.

These features will be better understood by referring to the accompanying drawings, taken in connection with the speciiication which follows, the same being a full and exact disclosureof the invention.

Figure l is a side elevation illustrating my improvement entire, portions being shown in dotted lines on the left. Fig. 2 is an end viewof Fig. 1, as seen looking from left to right. Fig. 3 is a longitudinal sectional view taken on linefx Fig. l, one end of the lampglobe being broken away. Fig. l is a crosssectional view of Fig. l, taken on line y y.-

I construct a lamp B of a tubular piece of glass of 'the desired length, using leading-in `wires of platinum D D and a corrugated or zigzag filament F of any preferred type, and

I seal the ends off in the well-known manner, exhausting and sealing the lamp, the leading-in wires D D being attached to trunnions E E at their ends, as shown. These trunnions are surrounded by plaster-of-paris or other filling and covered with metallic cups or bands G G.

C is a retaining-bracket of curvilinear crosssection, highly polished on its inner surface, so as to act as a reiiector when the lamp B is in position as shown. This retaining-bracket is made, preferably, of metal with the curvilinear portion pressed or struck up, as shown in Figs. 1 and 4, and insulating retainingheads N N are attached to it by screws for retaining the lamp in place. These heads have metallic contact-springs H H, connected directly by wires w w with the mains, (not shown,) but preferably located beneath the cornice-or molding of the car or room to be lighted in such a manner as to be out of sight. The left-hand ispring H has a pin l? with a rounded inner head adapted to abut against a loose spring-seated pin T, which is provided with a coiled seating-spring R. This pin T abuts in turn against the trunnion E when the lamp B is sprung in place. The

inner end of the right-hand spring His curved, as shown, so as to form a seat for the other trunnion E.

S is a spring-jack retaining-catch adapted to hold the right-hand trunnion firmly in position when the lamp is once seated, as shown in Fig. 3 in full lines, the dotted lines show.

IOO

ing said catch in position for removal of the lamp.

Sw is a hand-switch for turning the light oi or on, as desired. It consists of a button having attached thereto an insulated arm V, beveled at its upper end, so as to admit of its insertion, when raisd, between the pins P and T, thereby breaking the circuit at this point.

In Fig. 4 the lamp is shown in position in the upper portion of a car or room, the curved bracket C being embedded in the molding A, the lamp B being so located as to throw the light all down and in a plane parallel with the sides of the room.

In cars or steamboais these lamps Will be located, preferably, along the sides thereof, and hence entirely out of all drafts. They will be beneath the bracket-surface on a level with the Wall-surface, and hence not liable t0 be broken by contact with any object which is carried by.

The operation is obvious Without further explanation.

l find that my improved form of lamp is cheaply and easily made, and by reason of its Symmetry presents the same radiating and heating surface, thereby avoiding undue breakage. Such lamps can be securely and safely packed for transportation, and should they break near the ends the tubes can be used again for lamps of shorter pattern, thereby creatinga saving of great importance. This form of lamp', also, is especially adapted for the illumination of show-windows, artgalleries and theaters, and in many places which Will at once suggest themselves.

I do not desire to be limited to a horizontal location of the lamp, as other positions are obvious.

"What I do claim, and desire to secure by Letters Patent of the United States, is-

1. A wall-bracket for an incandescent lamp, consisting of an oblong sustaining-frame having a depression or groove, in combinatlon with a tubular incandescent lamp held 1n place in said groove, substantially as described.

2. A Wall-bracket for an incandescent lamp, consisting of an oblong support or frame having spring-contacts for making electrical contact with the poles of the lamp, the Whole being located below the face of the bracket, substantially as described.

The combination of a Wall-bracket having a depressed or grooved space for holding an incandescent lamp with spring-seated contacts and a catch for holding the lamp in place, substantially as described.

4. In an incandescent-lamp fixture, the combination of a tubular lamp located in an oblong depression with spring-seated contacts and a retaining-catch, substantially as described.

5. The combination of a tubular lamp with a grooved bracket, composing a reiector and electrical connections, as described.

6. The combination of the following elements: the grooved reflecting-bracket C, the tubular lamp B, having trunnions E E, the spring-seats H H, pin T, switch Sw, and rctaining-catch S, substantially as described.

JEAN THEODORE VAN GESTEL.

Vvlitnesses:

JAMES A. SIMMONS, B. C. HOWELL. 

